<div class="nav">
    <span class="menuButton">
    	<g:link class="menuitem" action="index" controller="user">
    		<g:message code="menuitem.uebersicht" />
    	</g:link>
    </span>
    <span class="menuButton">
    	<g:link class="menuitem" action="index" controller="userGruppen">
    		<g:message code="menuitem.gruppen" />
    	</g:link>
    </span>
</div>